quote Steve D:
bb is right, 201-B can be used for part numbers 0302984 / 0304940 / 0331181 / 0344037 for 3, 5.5, 7.5, 10, 18 HP. Your notes should say 304940 for the FD, maybe a just a typo, you had it right in your 1st post.
you’re correct steve, I did have a typo in the 2nd post. any idea as to why OMC has no part number listed for the RD/big twin models?